Answer by rems for Downloading images from ftp site using wget

You could try also ncftpget from the ncftp package. See http://www.ncftp.com/ but try to install a ncftp package for your distro.

From "man ncftpget"

-R      Recursive mode; copy whole directory trees.

You  can retrieve an entire directory tree of files by using the -R flag.  However, this will work only if the remote FTP server is a UNIX server, or emulates UNIX's list output.
   Example:

       $ ncftpget -R ftp.ncftp.com /tmp /pub/ncftp